Charles e



(No Model.)

G. B. SGRIBNER.

ELECTRIC ARG LAMP.

No. 491,604. Patented Feb.14, 1893.

STATES PATENT Orricn.

CHARLES E. SCRIBNER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE WESTERN yELECTRIC COMPANY, OF SAME PLACE.

ELECTRIC-ARC LAMP..

SPECIFICATION forming part of Letters Patent No. 491,604, dated February14, 1893.

Application filed October 30, 1890. Serial No, 369,797. (No model.)

To all whom it may con/cern: freely through its guide the guide will notbe Ile it known that I, CHARLES E. SCRIBNER, loaded with the weight ofthe rod and hence a citizen of the United States, residing at Chiwillhold the cut out open. If, however, the cago, in the county of Cook andState of Illrod shall stick in the guide so that any connois, haveinvented a certain new and useful siderable amountof the weightof therod shall 55 Improvement in Automatic Cut-Outs for Arc rest thereon,this increase of load will canse Lamps, (Case No. 233,) of which thefollowing the guido to yield and thus close the shunt at is a full,clear, concise, and exact description, the cut out. reference being hadto the accompanying My invention will be more readily underio drawing,forming a part of this specification. stood by reference to theaccompanying draW- 6o My invention relates to electric arc lamps ing, inwhich-I have shown a side elevation and its object is to providemechanical means of an electric are lamp partly in sectioneinoperated,automatically by the rod at a certain bodying my invention.The circuit et may be point in its descent or whenever the descenttraced through thelifting magnetband thence of the rod may be impeded,whereby the lamp to the frame of the lamps, thence through the .65 maybeshnnted out of circuit. Thus the circarbons c, and thence out to line.An ordicuit maybe maintained around a lamp which nary line wire feedingmagnet dis connected has ceased to feed, or one in which the carin theshunt around the carbons c and acts in bons have been consumed.Heretofore out the usual manner to operate the clutch to feed zo outsdependent upon the position of the clutch the carbon as the carbons areconsumed. The 7o mechanism, and hence upon the length or guide e for thecarbon rod may be of any electro motive force of the arc have beenemsuitable form, but it must be provided with a DlOYedyielding supportin order that it may be low- My invention herein consists, speakinggenered whenever the weight of the rod or a suberally, in providing`yielding guides for the stantial portion of the weight of the rod is 75carbon rod in connection with a circuit closer placed thereon. I haveprovided the adjustadapted to be closed whenever thekguides able iiatsprings fg upon which the yoke e shall be loaded with the Whole or anyconsiderformingtheguideis suspended. These springs able portion of theweight of the rod. The f g are secured each at one end to thefraxne 3ocut out is placed in the circuit of a direct of the lamp and upon theirprojecting free 8o shunt around the lamp. The main circuit exends theyoke e is mounted. Thus by means tends through the lifting magnet, andthence of the yoke e provided with openings through through the carbonsand ont. The shunt cirwhich the rod passes and the springs fg I cuitextends from the main circuit before provideayielding guide furthe rod.Vhenreaching the lifting magnet to a contact of ever the rod passesfreely through the open- 85 the cut out carried upon or controlled bythe ings in the ends of the yoke the springsfg yielding orswingingguide, the opposing conwill be loaded only by the Weight of the yoketact of the cut out being preferably fixed, and itself. If, however, therod should stick in from the opposing or fixed out out the shunt theguide a portion of the Weight of the rod 4o circuit may be extendeddirectly to the line will be placed upon the springs f g, and thus 9oout. Thus when the Vcut out is closed the they will be flexed and theguide will belowlamp is directly short circuited. ered. A suitable stoph provided on the rod Any suitable mechanical means directly opis soplaced that when the carbons are conl erated by the weight of the rodbeing transsnmed or nearly so this stop h will rest upon ferred theretofrom the clutch mechanism may the guide e, thus bringing the weight ofthe 95 be employed. rod upon the guide, thereby loading the In myinvention herein I have mounted the springsfg with the weight thereof soas to guide for the rod upon a yielding support and lower the positionof the guide. Now it is placed one of the contacts of the cut ont uponthis yielding rod guide or other suitable mech- 5o this yielding guide.When the rod passes anism, the position of which is changed by roo theWeight of the rod being transferred thereto from the clutch, which inconnection with a circuit closer t' constitutes myinvention. Thecontacts of the circuit closer or cut out are included in the directshunt k around the lamp; these contacts being controlled by the yieldingrod guide, or, speaking more particularly, by a portion of the lampmechanism which is adapted to be changed as to position by the Weight ofthe rod being placed thereon. Speeiiically I have shown the lowercontact of the cut out stationary, While the upper contact is mountedupon an arm extended from the yielding yoke or guide e. The tension ofthe springsfgis so adjusted that the cut out Will be closed when thesprings are loaded by a a Whole or substantial part of the weight of therod 7i, and whenever such Weight is removed the tension of the springswill act to raise the guide e so as to open the cutout.

I have thus described speciically one form of my apparatus. It isevident, however, that my invent-i011 admits of various modificationswhich would readily suggest themselves io those skilled in the art and Itheretore do not limit myself to the details of construction shown.

Having thus described my invention I claim as new and desire to secureby Letters Iatent:-

l. A direct shunt around an electric lamp, said shunt containing acircuit closer, in combination With the carbon rod and a yielding guidefor the carbon rod adapted to maintain said eut out opened or closedaccordingly as the weight of the rod is placed upon or removed from thesaid yielding guide.

2. The combination with the carbon rod of an electric arc lamp, of ayielding guide therefor, Contact points controlled by said guide to beclosed when the Weight of the rod comes upon the guide, and a shuntcircuit about the lamp including said contact points, substantially asdescribed.

In Witness whereof I hereunto subscribe my name this 23d day of October,A. D. 1890.

CHARLES E. SCRIBNER.

Witnesses:

ELLA EDLER, Gnonen L. CRAGG.

